v. 1 tr. sieve (material) into finer and coarser parts. 2 tr. (usu. foll. by from, out) separate (finer or coarser parts) from material. 3 tr. sprinkle (esp. sugar) from a perforated container. 4 tr. examine (evidence, facts, etc.) in order to assess authenticity etc. 5 intr. (of snow, light, etc.) fall as if from a sieve. sift through examine by sifting. sifter n. (also in comb.).
[ OE siftan f. WG ]